Fort Cobb, OK has a population of 604 and is the 18,397th largest city in the United States. The population density is 849 per sq mi which is 1455% higher than the Oklahoma average and 837% higher than the national average. The median age in Fort Cobb is 42 which is approximately 17% higher than the Oklahoma average of 36. In Fort Cobb, 58% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 82% of Fort Cobb residents were born in Oklahoma, 18% were born out of state, 0% were born outside of the United States and 0% were foreign born.